I'm comparing to SF and NYC. It's definitely the cleanliness. If it wasn't for residents cleaning it up, those tiny alleyways in tokyo would just accumulate shit to the point where it's disgusting to even walk through it.
Residents in SF and NYC don't bother so it all goes to shit.
In terms of pollution, LA probably has the worst pollution but it's cleaner then SF and NYC. So it doesn't correlate. It's not the pollution. Pollution correlates more with car usage, of which LA takes the cake.
Griminess more has to do with population density, Of which, Tokyo takes the cake and also bucks the trend.
Residents in SF and NYC don't bother so it all goes to shit.
In terms of pollution, LA probably has the worst pollution but it's cleaner then SF and NYC. So it doesn't correlate. It's not the pollution. Pollution correlates more with car usage, of which LA takes the cake.
Griminess more has to do with population density, Of which, Tokyo takes the cake and also bucks the trend.